My question is: Improvisation. if someone is lacking some of the professional elements needed in DIY photography, such as ready made developer, stop bath, fixer or if certain equipment is broken (the enlarger, perhaps), is it possible to MacGyver one's way through the process? Such as mixing chemicals from other available, off-the-shelf materials/household products? Improvising, somehow? Of course the quality won't be as good, but it's the creativity that counts.
Googling "photography chemicals" and variants thereof has turned up a guide to the chemical ingredients in the developer, stop bath and fixer, but not how to improvise/be creative if one doesn't have access to these from a professional photo shop.
Advice/help or any useful internet resources much appreciated. Thanks!